From: Keir Fraser <keir.fraser@citrix.com>
Date: Mon, 21 Jun 2010 08:55:12 +0000 (+0100)
Subject: libxc: Fix Segmentation fault of xend
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~11903
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22?a=commitdiff_plain;h=ff4cc394909125814f2a1e2e8e592b105f5ffc44;p=xen.git

libxc: Fix Segmentation fault of xend

If /proc/xen/privcmd cannot be opened,
start xend occurs Segmentation fault.
Add check to fix it.

Signed-off-by: Yu Zhiguo <yuzg@cn.fujitsu.com>
---

diff --git a/tools/libxc/xc_private.c b/tools/libxc/xc_private.c
index 9761b98af4..13a990a58c 100644
--- a/tools/libxc/xc_private.c
+++ b/tools/libxc/xc_private.c
@@ -82,8 +82,10 @@ const xc_error *xc_get_last_error(xc_interface *xch)
 
 void xc_clear_last_error(xc_interface *xch)
 {
-    xch->last_error.code = XC_ERROR_NONE;
-    xch->last_error.message[0] = '\0';
+    if (xch) {
+        xch->last_error.code = XC_ERROR_NONE;
+        xch->last_error.message[0] = '\0';
+    }
 }
 
 const char *xc_error_code_to_desc(int code)